I have a 1967 coupe barracuda with a low serial number and shipped march 1966.

pishta said
Canadian build may have gotten a different VIN format?

No...with the introduction of the AutoPact in 1966, all VINs, be it US or Canada were standardized to the US system, so a car built for Canada, or in Canada, would have the same VIN system as the US of A.